chore: Fixes props validator issue with CBotton component

[kurotanshi]

Description

Fixes props validator issue with CBotton component, when size set to "xs".

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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🔍 Inspect: https://vercel.com/chakra-ui/chakra-ui-vue/9whcqzdfj
✅ Preview: https://chakra-ui-vue-git-fork-kurotanshi-fix-cbutton-prop-validator.chakra-ui.vercel.app

[codebender828]

Good catch here, @kurotanshi ! Thank you for the PR. 👍🏽

I've requested a small change to the validator to include the xs size.

[codebender828]

Thank you @kurotanshi

[codebender828]

@all-contributors please add @kurotanshi for code

[allcontributors]

@codebender828

I've put up a pull request to add @kurotanshi! 🎉